Eleventh annual report of the United States Geological and Geographical Survey of the Territories : embracing Idaho and Wyoming : being a report of progress of the exploration for the year 1877 . TKos Sinclair* PLATE 8. Pag*. Fig. 1. Pachymya atjstinensis 298 a. Left valve, reduced to two-thirds of the natural diameter, from Dr. Shumards figure. b. Natural cast; dorsal view; reduced one-half of the natural diameter from a specimen from Salado, , also, Plate 5, figs. 7 a and b. Fig. 2. Ostrea (Alectetonia) bellaplicata 276 a. Exterior view of upper valve; natural size. b. Interi
Eleventh annual report of the United States Geological and Geographical Survey of the Territories : embracing Idaho and Wyoming : being a report of progress of the exploration for the year 1877 . TKos Sinclair* PLATE 8. Pag*. Fig. 1. Pachymya atjstinensis 298 a. Left valve, reduced to two-thirds of the natural diameter, from Dr. Shumards figure. b. Natural cast; dorsal view; reduced one-half of the natural diameter from a specimen from Salado, , also, Plate 5, figs. 7 a and b. Fig. 2. Ostrea (Alectetonia) bellaplicata 276 a. Exterior view of upper valve; natural size. b. Interior view of the same. From photograph copies of Dr. Shumards original , also, Plate 4, figs. 3 a and b. Fig. 3. Ostrea quadriplicata 275 a. Lower valve; natural size. b. Upper valve. Both from photograph copies of Dr. Shumards original , also, Plate 5, fig. 6 a. 3 GEOLOGICAL S JRVEY. .
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